-2- 



precaution, wear protective clothing. Higher dosages of carbofuran will require 

 longer waiting periods. Do not apply carbofuran more than once per season. 



2. Persons not equipped with protective clothing . Use: (1) Imidan at 1 pound per 

 acre; (2) a mixture of 3/4 pound of malathion and 3/4 pound of methoxychlor per 

 acre; (3) a mixture containing at least 1/2 pound of diazinon and 1 pound of 

 methoxychlor (Alfa-Tox) per acre; or (4) 1-1/4 pounds of malathion per acre on 

 days when air temperatures will be about 60° F. for several hours after appli- 

 cation. Do not harvest for 7 days after treatment with Imidan, methoxychlor, 

 diazinon, or mixtures of them. There is no waiting period for malathion. Do 

 not apply Imidan more than once per cutting. 



RESTRICTIONS ON INSECTICIDE USE 



Two weeks ago we mentioned that aldrin, heptachlor, and certain other insecticides 

 can no longer be used legally on dairy farms in Illinois, by regulation of the Illi- 

 nois Department of Public Health; also, that we had recommendations earlier in Illi- 

 nois restricting the use of aldrin and heptachlor in a rotation involving soybeans. 

 This was done despite the fact that these products did have a federal label registra- 

 tion. 



We stopped recommending the use of aldrin, chlordane, and heptachlor as corn soil 

 insecticides in 1970 because of insect resistance or residues. Our statement of 

 two weeks ago was construed by some as a recommendation for these products. It 

 was not. 



HOMEOWNER INSECT PROBLEMS 



Brown recluse spiders continue to attract attention in Illinois. Dr. John D. Un- 

 zicker, entomologist at the Illinois Natural History Survey, has identified speci- 

 mens of this spider from 50 of Illinois' 102 counties (see map). 



The body of this spider is about half an 

 inch long. The leg span is an inch to an 

 inch and a half. The color varies from 

 light fawn to almost dark brown. There is 

 a distinct, fiddle-shaped, dark marking be- 

 hind the head (see picture) . 



Although reports of persons bitten by this 

 spider are not numerous over the state, 

 its bite is poisonous. Unfortunately, the 

 origin of spider or insect bites is often 

 unknown. Most are attributed to the brown 

 recluse spider because of the resulting 

 wound. This spider bites only when dis- 

 turbed. Little or nothing is known about 

 the bites of many common household spiders. 



Other species may be responsible for some of the bites attributed to the brown recluse 

 spider. Consult a physician about any spider bite. 



The brown recluse has a habit of living in dark, sheltered areas (such as attics or 

 crawl spaces), in storage areas, basements, or barns, and bites only when disturbed. 

 Unlike other web spinning spiders, it spins a small, irregular web. 



